합성 wustite 의 흑연에 의한 환원속도론

김선효,윤종규 대한금속재료학회(대한금속학회) 1979 대한금속·재료학회지 Vol.17 No.4

反應中 생기는 氣媒介體 CO와 CO₂를 通해 일어나는 合成 wu¨stite의 黑鉛에 의한 還元反應이 950℃∼1075℃ 溫度範圍에서 示差熱分析裝置에 의해 Ar분위기中의 등온 條件下에서 行해졌다. 還元反應에 대한 機構와 速度는 Rao에 의해 제시된 modified physico-chemical model에 의해 조사되었으며 아울러 이의 妥當性에 대한 硏究가 이루어졌다. 黑鉛함량 및 wu¨stite 粒子크기와 混合體에 加한 壓力이 還元反應速度에 미치는 영향도 分析검토하였다. 反應의 초기단계와 끝部分을 제외한全 還元反應은 Rao의 modified model에 잘 들어맞고 있음이 나타났다. 氣相媒介體를 通한 wu¨stite의 黑鉛에 의한 還元反應에 必要한 活法化에너지는 57Kcal/㏖임이 얻어졌고 이 값은 文獻과 잘 일치하고 있는 것으로 밝혀졌다. 還元反應速度式은 X=2au[1-exp(-kt)〕이 됨이 나타났다. Reduction reaction of synthetic Wustite by graphite through the gaseous intermediates CO and CO₂occuring during the reaction was carried out isothermally within the temperature range 950℃ to 1075℃ in an inert Ar atmosphere with T.G.-D.T.A. analysis technique. The mechanism and the rate of reduction reaction were investigated with modified physico-chemical model derived by Rao and the suitability of Rao's model to this reaction system was studied, too. The effects of variables such as C/FeO molar ratio, Wustite powder size to the rate of reduction reaction and the compactness of mixed powder were discussed. The overall reduction reaction but the initial stage and the tail part of reaction was considered to be well fitted to the modified physico-chemical model. The activation energy for the Wustite reduction by graphite through the gaseous intermediates is calculated to be 57Kcal/㏖ and this value is reasonably in good agreement with the literature. The rate equation of reduction reaction through the gaseous intermediates was found to be X=2av [1-exp (-kt).〕.

Marsupialization of the Nictitating Membrane Cyst Following Cherry Eye Repair in a Dog

김선효,강선미,Lina Susanti,김보윤,박윤지,심재호,고석민,이은지,서강문 한국임상수의학회 2020 한국임상수의학회지 Vol.37 No.3

One-year-old male Cocker Spaniel dog was referred for the third eyelid enlargement and inflammation in the left eye (OS). It gradually swelled for 2 weeks after the cherry eye repair by conjunctival mucosa pocket procedure at a private animal clinic. Routine ophthalmic examinations including neuro-ophthalmic examination, Schirmer tear test, intraocular pressure and corneal fluorescein staining were all normal. No lesions were found on slit lamp biomicroscopy and indirect ophthalmoscopy except for third eyelid swelling in the OS. Ultrasonography revealed cystic structure within the OS nictitating membrane. Fluid from the cyst was aspirated and there were no microorganisms or neoplastic changes. Surgical intervention was performed under general anesthesia. On the day of the surgery, there was a deep corneal ulcer in the OS, which had not existed before. Ventral palpebral surface of the third eyelid was incised horizontally to the shaft of the T-shaped hyaline cartilage. And then, a full thickness of the cystic wall was incised and marsupialized. Additionally, a direct suture was performed on the ulcerated cornea. Topical and systemic antibiotics and anti-inflammatory drugs were prescribed. One month after the surgery, the third eyelid swelling and the discharge were improved. Marsupialization of the nictitating membrane cyst relieved the swelling of the third eyelid and inflammation. It could be a simple but effective surgical intervention for the cystic complication of conjunctival mucosa pocket procedure in dogs.

學問目的 韓國語의 글쓰기 現況과 方向性 -大學 敎養 必須科目의 特殊 學問目的 글쓰기를 中心으로-

김선효 한국어문교육연구회 2012 어문연구(語文硏究) Vol.40 No.3

This article reviews the current situations of Korean Academic Writing (KAW) classes for foreigners or overseas Koreans in Korea and suggests the direction for future KAW courses. A number of Korean universities began offering KAW classes to Korean students since 2000. In particular, in order to meet the growing number of foreign students' needs on campus, many universities offer KAW classes only for foreign students and overseas Koreans. Currently, the KAW program has quantitatively increased. However, compared to the quantity, the quality of the KAW program has not improved as much. In order to improve the quality of the program, first, we need to establish a clear educational objective with an emphasis on academic writing. Otherwise, the KAW courses are not different from the courses offered by Korean Learning Center. Also, as formal expressions and appropriate contents are important in academic writing, we need to develop more courses and materials that focus on academic writing. The courses and materials need to be designed to help students' language skills as well as their discourse skills (e.g., Korean turn-taking rules). Lastly, to manage the KAW program more efficiently, it's important to minimize the number of students in a class, supplement writing system, develop advanced writing courses, and separate foreigner classes into overseas Korean classes. 本 硏究의 目的은 국내 대학에서 교양 필수과목으로 개설되어 있는 학술적 글쓰기 강좌, 즉 특수 학문목적 글쓰기의 講座 現況, 敎育 目標 및 內容, 運營 體系의 방향성을 제시하는 데 두었다. 각 대학은 外國人을 위한 교양필수 글쓰기 강좌를 開設하고 있으나 교육의 목표나 내용, 체계 등에서 一般班과 偏差를 보여 특수 학문목적 글쓰기에 적합한 敎育 目標와 敎育 內容, 運營 體系를 定立해 보았다. 外國人班의 학술적 글쓰기의 巨視的 目標는 一般班과 동일하게 적용하되 微視的으로는 학술적인 글에 적합한 글쓰기 능력을 涵養하는 1차적 목표와, 語彙力, 思考力, 意思疏通 能力을 涵養하는 2차적 목표로 세분할 수 있다. 특수 학문목적 글쓰기의 敎育 內容으로는 글쓰기의 이론과 실습, 전공 어휘 및 고급 한자어 학습, 텍스트 이해력 향상, 발표와 토론 등을 제시할 수 있다. 외국인반의 학술적 글쓰기를 효율적으로 운영하기 위해서는 受講生의 定員을 最小化하고 補助 敎育 프로그램을 개발하며 교양 필수과목 글쓰기 以後의 後續 課程을 개발하는 것이 필요하다.

한국어 학습자를 위한 한국어동료튜터링(peer tutoring)의 성과와 방향성 -서울대학교 ‘글쓰기의 기초’ 강좌를 중심으로-

김선효 한국어의미학회 2015 한국어 의미학 Vol.47 No.-

Kim Sunhyo. 2015. Attainment and Directivity of Korean Peer Tutoring for Korean Learners; A Case Study of ‘Korean Writing Ⅰ’ on Seoul National University. Korean Semantics, 47. This paper explored that Korean Peer Tutoring(KPT) is proper learning activities for korean learners at the writing class, and suggested better KPT directions for foreigners and overseas Koreans. Through the survey KPT was verified a learning activity for improving Korean abilities of Korean learners on the basis of expectation and satisfaction of KPT activities, KPT domains which included learning activities and non-learning activities. Korean tutees evaluated KPT was very useful and proper learning activities, above all satisfactional rate is higher frequency than expectative rate. KPT has carried out both learning activities that Korean writing courses and non-learning activities that are focus on making friends and adjusting new college life and so on. However, it was identified that foreign learners evaluated positively both learning activities and non-learning activities, but overseas koreans prefer to learning activities, especially in writing. (Chinese Cultural University, Taiwan)

기고 ② - 청소년 영양 섭취, 학교우유급식 참여자가 높아

김선효,Kim, Seon-Hyo 한국낙농육우협회 2016 낙농·육우 Vol.36 No.2

의사관형구조 ‘에의’의 형성 과정과 요인

김선효 국어학회 2009 국어학 Vol.0 No.55

본고는 의사관형구조 ‘에의’가 국어의 통사구조에 나타난 시기와 그 원인을 분석하는 데 목적을 두었다. ‘에의’가 국어의 문헌에서 확인되는 것은 1920년대이지만 적극적으로 쓰인 것은 1930년대부터이다. 그러나 이러한 ‘에의’ 구조는 1920년대에 새롭게 형성된 통사구조가 아니라 중세국어부터 근대국어에 이르기까지 지속적으로 쓰이고 있었던 구조이다. ‘에의’의 소급형인 전기 중세국어의 ‘□□’(앗)이나 후기 중세국어의 ‘엣’이 국어의 통사구조에서 활발하게 쓰이다가 근대국어에 접어들어서 점진적으로 약화되었고 19세기에 이르면 거의 소멸 상태까지 이르다가 1920년을 전후하여 다시 재활성한다. 이러한 약화 현상의 근본적인 원인은 관형격조사 ‘ㅅ’의 기능 약화와, 17세기에 나타난 관형격조사 ‘에’와 부사격조사 ‘의’의 형태적 혼용 양상과 같은 요인이 가장 큰 영향을 끼쳤다고 본다.

중등학교 가정교과 식생활교육을 위한 청소년의 우유 섭취, 영양 섭취 및체력과의 관계 연구

김선효 한국가정과교육학회 2016 한국가정과교육학회지 Vol.28 No.4

This study was performed to investigate the relationship between milk consumption, dietary nutrient intake, and physical strength in Korean adolescents for dietary education of home economics subject at middle and high schools. Intake of milk and milk products, that of dietary nutrients, and physical strength records were surveyed for 298 high school students resided in small and medium-sized cities in Korea. Intake of milk and milk products was collected from three-day dietary survey, and daily dairy equivalent of calcium was calculated by dividing daily calcium intake(mg) from milk and milk products by calcium content(200 mg) of 200 mL milk. Dietary survey was performed during three days including two-weekdays and one-weekend by food record method. Dietary nutrient intake was analyzed by CAN-Pro 3.0. Physical strength records were offered from subjects’ schools. Subjects were divided into low intake group(≤0.29/d), medium intake group(0.30-0.78/d) and high intake group(0.79-5.66/d) according to daily mean dairy equivalent of calcium taken by them, and most of them consumed milk and milk products less than ‘2’ of the recommended value. Daily mean dairy equivalent of calcium was significantly related with high records of ‘50 m running’ and ‘stand long jump’(p<0.05), however it was not related with other records of physical strength. Intakes of energy, carbohydrate, protein, fat, calcium, phosphorus, iron, zinc, thiamin, riboflavin, niacin and vitamin E were significantly correlated with high record of ‘50 m running’(p<0.01). Intakes of nutrients were related with ‘50 m running’ except fat were significantly correlated with high record of ‘stand long jump’(p<0.05). Intakes of protein, phosphorus, iron, zinc, vitamin A, B6 and E were significantly correlated with high record of ‘long distance running’(p<0.05). In conclusion intake of milk and milk products was related with physical strength records(‘50 m running’ and ‘stand long jump’) and intakes of most nutrients including energy nutrient, vitamin and mineral were correlated with physical strength records(‘50 m running’, ‘stand long jump’ and ‘long distance running’) in Korean adolescents. Therefore, optimal consumption of milk and various nutrients for balanced nutrition during adolescents should be emphasized in dietary education of home economics subject for their strong physical strength. 본 연구는 청소년의 우유 섭취, 영양 섭취 및 체력 간의 관계를 알아보고자 실시되었다. 시도교육청과 학교의 협조를 받아 선정한중소도시에 거주하는 298명의 청소년을 대상으로 평소 식사 및 체력장 기록을 조사하였다. 우유・유제품 섭취는 식사조사를 이용해파악하였고, 우유・유제품으로 섭취한 1일 평균 칼슘 섭취량을 우유 200 mL 중의 칼슘 함량과 비교해 1일 평균 우유칼슘당량을 구하였다. 식사조사는 식사기록법에 의해 주중 2일과 주말 1일을 포함하는 3일간 실시하였고, 식사조사지의 식사 내용을 CAN-Pro 3.0에입력해 영양소 섭취량을 구한 후 1일 평균 영양소 섭취량을 산출하였다. 체력장 기록은 학교에서 정규적으로 실시하는 자료에 따랐다. 조사 대상 청소년의 1일 평균 우유칼슘당량은 우유칼슘당량을 기준으로 분류한 저섭취군(≤0.29/일), 중섭취군(0.30-0.78/일), 고섭취군(0.79-5.66/일)에서 모두 권장 수준인 ‘2’보다 낮아 조사대상자의 우유 섭취가 전반적으로 부족하였다. 1일 평균 우유칼슘당량이높을수록 50 m 달리기와 제자리멀리뛰기 기록이 유의적으로 높았다. 그리고 대부분의 에너지 영양소, 비타민, 무기질의 1일 평균섭취량과 50 m 달리기, 제자리멀기뛰기, 오래달리기 기록이 높은 방향으로 유의적인 상관관계가 있었다(p<0.05). 따라서 청소년기에우유 섭취와 함께 균형잡힌 영양 섭취를 하면 체력 향상에 도움이 되므로 중등학교 가정교과의 식생활교육에서 청소년기에 1일 2컵의우유 섭취를 실천하도록 지도해야 하며 아울러 중등학교의 학교우유급식 활성화를 위한 제도적 뒷받침도 이루어질 필요가 있다고하겠다. ￭논문접수일자:

-적'형의 통사적 범주와 의미

김선효 서울대학교 국어국문학과 2002 冠嶽語文硏究 Vol.27 No.-

우유의 영양성분과 영양적 가치 고찰

김선효 공주대학교 과학교육연구소 2015 과학교육연구 Vol.45 No.1

Milk is a rich source of fat, protein, amino acids, vitamins and minerals, thus we should consume 1-2 cups/day of milk for nutrition and health. However, anti-milk information is spreaded recently and this trend prevents right consumption of milk. This study was performed to review the nutritional values of milk to provide a scientific evidence of milk and support the reasonable consumption of milk.

우유 섭취와 건강과의 관련성 고찰

김선효 공주대학교 과학교육연구소 2015 과학교육연구 Vol.45 No.1

Milk is a rich source of health functional component, thus milk is helpful for preventing various diseases such as osteoporosis, hypertension, cancer, cardiovascular disease and diabetes. This study was performed to review the relationship between milk and health to provide a scientific evidence for appropriate use of milk.